[llvm] [Lint][AMDGPU] No store to const addrspace (PR #109181)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,42 @@
+; RUN: not opt --mtriple=amdgcn --passes=lint --lint-abort-on-error %s -o /dev/null |& FileCheck %s
+; RUN: opt --mtriple=amdgcn --mcpu=gfx1030 --passes=lint %s -o /dev/null |& FileCheck %s --check-prefixes=CHECK,CHECK0
+; RUN: opt --mtriple=x86_64 --passes=lint --lint-abort-on-error %s -o /dev/null |& FileCheck %s --allow-empty --check-prefix=NOERR
+; NOERR: {{^$}}
+
+define amdgpu_kernel void @store_const(ptr addrspace(4) %out, i32 %a, i32 %b) {
+; CHECK: Undefined behavior: Write to memory in const addrspace
+; CHECK-NEXT: store i32 %r, ptr addrspace(4) %out
+  %r = add i32 %a, %b
+  store i32 %r, ptr addrspace(4) %out
+  ret void
+}
+
+declare void @llvm.memset.p4.i64(ptr addrspace(4) noalias nocapture writeonly, i8, i64, i1)
+define amdgpu_kernel void @memset_const(ptr addrspace(4) %dst) {
+; CHECK0: Undefined behavior: Write to memory in const addrspace
+; CHECK0-NEXT: call void @llvm.memset.p4.i64(ptr addrspace(4) %dst, i8 0, i64 256, i1 false)
+  call void @llvm.memset.p4.i64(ptr addrspace(4) %dst, i8 0, i64 256, i1 false)
+  ret void
+}
+
+declare void @llvm.memcpy.p6.p0.i32(ptr addrspace(6) noalias nocapture writeonly, ptr noalias nocapture readonly, i32, i1)
+define amdgpu_kernel void @memcpy_to_const(ptr addrspace(6) %dst, ptr %src) {
+; CHECK0: Undefined behavior: Write to memory in const addrspace
+; CHECK0-NEXT: call void @llvm.memcpy.p6.p0.i32(ptr addrspace(6) %dst, ptr %src, i32 256, i1 false)
+  call void @llvm.memcpy.p6.p0.i32(ptr addrspace(6) %dst, ptr %src, i32 256, i1 false)
+  ret void
+}
+
+define amdgpu_kernel void @cmpxchg_to_const(ptr addrspace(4) %dst, i32 %src) {
+; CHECK0: Undefined behavior: Write to memory in const addrspace
+; CHECK0-NEXT: %void = cmpxchg ptr addrspace(4) %dst, i32 0, i32 %src seq_cst monotonic
+  %void = cmpxchg ptr addrspace(4) %dst, i32 0, i32 %src seq_cst monotonic
+  ret void
+}
+
+define amdgpu_kernel void @atomicrmw_to_const(ptr addrspace(4) %dst, i32 %src) {
+; CHECK0: Undefined behavior: Write to memory in const addrspace
+; CHECK0-NEXT: %void = atomicrmw add ptr addrspace(4) %dst, i32 %src acquire
+  %void = atomicrmw add ptr addrspace(4) %dst, i32 %src acquire
+  ret void
+}
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arsenm wrote:

Maybe test arbitrary call that may write (those probably should not fail )

https://github.com/llvm/llvm-project/pull/109181